195840823 has 4 divisors (see below), whose sum is σ = 198523648. Its totient is φ = 193158000.

The previous prime is 195840817. The next prime is 195840859. The reversal of 195840823 is 328048591.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 195840823 - 2⁹ = 195840311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195840803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1341303 + ... + 1341448.

It is an arithmetic number, because the mean of its divisors is an integer number (49630912).

Almost surely, 2^195840823 is an apocalyptic number.

195840823 is a deficient number, since it is larger than the sum of its proper divisors (2682825).

195840823 is an equidigital number, since it uses as much as digits as its factorization.

195840823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682824.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 195840823 is about 13994.3139524594. The cubic root of 195840823 is about 580.7212816040.

The spelling of 195840823 in words is "one hundred ninety-five million, eight hundred forty thousand, eight hundred twenty-three".